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Licensed Unlicensed Requires Authentication Published by Oldenbourg Wissenschaftsverlag October 10, 2020

In-process and ex-situ measurement techniques for the characterization of surface conditions during cryogenic hard turning of AISI 52100

In-process- und ex-situ-Messverfahren zur Charakterisierung des Randschichtzustands beim kryogenen Hartdrehen von AISI 52100
Julian Uebel, Werner Ankener, Stephan Basten, Marek Smaga, Benjamin Kirsch, Jörg Seewig, Tilmann Beck and Jan C. Aurich
From the journal tm - Technisches Messen

Abstract

The surface layer states of a component are of great importance for the application of hard turned parts. Without a multitude of tests and experience, the states cannot be reliably produced due to process-typical disturbance variables such as tool wear and batch inclusions. The aim of this research is to control the surface layer states during cryogenic hard turning of AISI 52100 by feedforward control and the use of a soft sensor. This paper presents the measurement techniques used in this context. On the one hand, the in-process measurement technology and challenges involved are discussed. On the other hand, the challenges in the ex-situ measurement technique for characterizing the surface layer states are shown using micro hardness measurement as an example.

Zusammenfassung

Die Funktionseigenschaften eines Bauteils werden maßgeblich von dem Randschichtzustand bestimmt. Da das Einstellen dieses Zustands im Endbearbeitungsprozess von prozesstypischen Störgrößen, wie beispielsweise dem Werkzeugverschleiß und Chargeneinflüssen beeinflusst wird, können diese Eigenschaften nur durch Iterationsschleifen in Verbindung mit Erfahrung erzeugt werden. Ziel der Forschung ist es, die Randschichtzustände beim kryogenen Hartdrehen von 100Cr6 durch eine Vorsteuerung in Verbindung mit einem Softsensor zu überwachen und gezielt einzustellen. Das vorliegende Paper geht in diesem Kontext auf die verwendete Messtechnik ein: zunächst auf die In-process-Messtechnik und die damit verbundenen Herausforderungen, anschließend auf die Schwierigkeiten bei der Charakterisierung des Randschichtzustands am Beispiel der Mikrohärtemessung.

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Received: 2020-07-20
Accepted: 2020-09-08
Published Online: 2020-10-10
Published in Print: 2020-11-26

© 2020 Walter de Gruyter GmbH, Berlin/Boston

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